Journal
SENSORS
Volume 7, Issue 11, Pages 2671-2680Publisher
MDPI
DOI: 10.3390/s7112671
Keywords
electrochemical DNA sensors; methylene blue; electrochemical indicators
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In this work, we reported a systematic investigation on the interactions between methylene blue (MB) and surface-confined DNA by using electrochemical methods. We demonstrated that the redox potential of MB and binding and dissociation kinetics of MB to DNA differed significantly for single- stranded DNA (ss-DNA) and double-stranded DNA (ds-DNA) immobilized on gold electrodes. This was possibly due to the different binding mechanism between MB and ss- or ds-DNA. This work might provide useful information for developing MB-based sequence- specific electrochemical DNA sensors.
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